From 6aec307fcced3dbd5dc47c52c79bd5c833021f51 Mon Sep 17 00:00:00 2001
From: Ralph Corderoy <ralph@inputplus.co.uk>
Date: Sun, 13 Aug 2017 18:07:33 +0100
Subject: [PATCH] inc.c: Alter pop_action() to check I/O, perhaps returning
 NOTOK.

---
 uip/inc.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/uip/inc.c b/uip/inc.c
index 9a72aa45..20d4088b 100644
--- a/uip/inc.c
+++ b/uip/inc.c
@@ -918,7 +918,11 @@ static int
 pop_action(void *closure, char *s)
 {
     NMH_UNUSED(closure);
-    fprintf (pf, "%s\n", s);
-    stop += strlen (s) + 1;
+
+    if (fputs(s, pf) == EOF || putc('\n', pf) == EOF)
+        return NOTOK;
+
+    stop += strlen(s) + 1; /* Count linefeed too. */
+
     return OK;
 }
-- 
2.56.0